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change as request

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This commit is contained in:
taiyang-li 2023-01-20 17:05:28 +08:00
parent 8d63dc2608
commit 01048c6568
1 changed files with 21 additions and 5 deletions
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26
src/Functions/PositionImpl.h
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@ -205,21 +205,37 @@ struct PositionImpl
{
for (auto & x : res)
x = 1;
return;
}
else
ColumnString::Offset prev_offset = 0;
auto rows = haystack_offsets.size();
const ColumnConst * start_pos_const = typeid_cast<const ColumnConst *>(&*start_pos);
if (start_pos_const)
{
ColumnString::Offset prev_offset = 0;
for (size_t i = 0; i < haystack_offsets.size(); ++i)
UInt64 start = std::max(start_pos_const->getUInt(0), UInt64(1));
for (size_t i = 0; i < rows; ++i)
{
size_t haystack_size = Impl::countChars(
reinterpret_cast<const char *>(pos), reinterpret_cast<const char *>(pos + haystack_offsets[i] - prev_offset - 1));
UInt64 start = start_pos->getUInt(i);
start = std::max(UInt64(1), start);
res[i] = start <= haystack_size + 1 ? start : 0;
pos = begin + haystack_offsets[i];
prev_offset = haystack_offsets[i];
}
return;
}
for (size_t i = 0; i < rows; ++i)
{
size_t haystack_size = Impl::countChars(
reinterpret_cast<const char *>(pos), reinterpret_cast<const char *>(pos + haystack_offsets[i] - prev_offset - 1));
UInt64 start = start_pos->getUInt(i);
start = std::max(UInt64(1), start);
res[i] = start <= haystack_size + 1 ? start : 0;
pos = begin + haystack_offsets[i];
prev_offset = haystack_offsets[i];
}
return;
}